The present invention relates to an elastic fiber dry radiating element and a radiating element. The radiating element includes a temperature control box (3) including a housing (31) in which a plurality of mutually spaced polymer solution passages (32) are installed in the longitudinal direction; A radiation part 4 detachably connected to the temperature control box 3 and including a plurality of mutually spaced radiation hole sets 41 communicating with an outlet of one polymer solution passage 32, The area outside each polymer solution passage 32 in the housing 31 is a cavity used to circulate the fluid medium for heat exchange with the elastic fiber dry spinning polymer solution in the polymer solution passage 32. The radiation component includes a metering device detachably connected to the temperature control box (3), for metering the elastic fiber dry spinning polymer solution and arranging the polymer solution solution in a plurality of polymer solution passages (32), and the radiating element. The radiating element and the radiating element are convenient for installation and repair, and have high efficiency.
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